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uartz, feldspar, and mica, but having these materials, especially the mica, arranged in planes, so that it breaks rather easily into coarse slabs or flags. Hornblende sometimes takes the place of the mica, and it is then called hornblendic or syenitic gneiss. Similar varieties of related rocks are also called gneiss.…

A Japanese game, played on a checkerboard, in which the object of the game is to be the first in placing five pieces, or men, in a row in any direction.

strument for measuring angles, especially the angles of crystals, or the inclination of planes. Contact, or Hand, goniometer, a goniometer having two movable arms (ab, cd), between which (at ab) the faces of the crystals are placed. These arms turn about a fixed point, which is the center of the graduated circle or sem…

whitish, grayish, or flesh-red color. It differs from gneiss in not having the mica in planes, and therefor in being destitute of a schistose structure.

A European sandpiper or snipe (Totanus canescens); -- called also greater plover.

round line (Descriptive Geom.), the line of intersection of the horizontal and vertical planes of projection. -- Ground liverwort (Bot.), a flowerless plant with a broad flat forking thallus and the fruit raised on peduncled and radiated receptacles (Marchantia polymorpha). -- Ground mail, in Scotland, the fee paid f…

Having the planes arranged spirally, so that they incline all to the right (or left) of a vertical line; -- said of certain hemihedral forms.

of the temple of Jerusalem to replace the altar which had been polluted by Antiochus Epiphanes (1 Maccabees i. 58, iv. 59). The feast, which is mentioned in John x. 22, is held for eight days (beginning with the 25th day of Kislev, corresponding to December), and is celebrated everywhere, chiefly as a festival of light…

Steel hardened by the addition of other elements, as manganese, phosphorus, or (usually) carbon.

Native sulphide of manganese a reddish brown or brownish black mineral.

ilaginous process developed from the heel bone of bats. It helps to support the wing membranes. See Illust. of Cheiropter.

perty that has been in a family for several generations. Woe to him whose daring hand profanes The honored heirlooms of his ancestors. Moir.

A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur.

Having half of the similar parts of a crystals, instead of all; consisting of half the planes which full symmetry would require, as when a cube has planes only on half of its eight solid angles, or one plane out of a pair on each of its edges; or as in the case of a tetrahedron, which is hemihedral to an octahedron, it…

Presenting hemihedral forms, in which half the sectants have the full number of planes.

Having the two ends modified with unlike planes; -- said of a crystal.

eaves furnish a red coloring matter used in the East to stain the hails and fingers, the manes of horses, etc.

A corner. [Obs.] Lurking in hernes and in lanes blind. Chaucer.

Covered with short, dense, grayish white hairs; canescent. Hoary bat (Zoöl.), an American bat (Atalapha cinerea), having the hair yellowish, or brown, tipped with white.

A holiday commemorating the expulsion of the Danes, formerly observed on the second Tuesday after Easter; -- called also hocktide. [Eng.] [Written also hokeday.]